#runas solve(4)
#pythran export solve(int)
def solve(adj):
    nums = [
        [ 8, 2,22,97,38,15, 0,40, 0,75, 4, 5, 7,78,52,12,50,77,91, 8,],
        [49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48, 4,56,62, 0,],
        [81,49,31,73,55,79,14,29,93,71,40,67,53,88,30, 3,49,13,36,65,],
        [52,70,95,23, 4,60,11,42,69,24,68,56, 1,32,56,71,37, 2,36,91,],
        [22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80,],
        [24,47,32,60,99, 3,45, 2,44,75,33,53,78,36,84,20,35,17,12,50,],
        [32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70,],
        [67,26,20,68, 2,62,12,20,95,63,94,39,63, 8,40,91,66,49,94,21,],
        [24,55,58, 5,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72,],
        [21,36,23, 9,75, 0,76,44,20,45,35,14, 0,61,33,97,34,31,33,95,],
        [78,17,53,28,22,75,31,67,15,94, 3,80, 4,62,16,14, 9,53,56,92,],
        [16,39, 5,42,96,35,31,47,55,58,88,24, 0,17,54,24,36,29,85,57,],
        [86,56, 0,48,35,71,89, 7, 5,44,44,37,44,60,21,58,51,54,17,58,],
        [19,80,81,68, 5,94,47,69,28,73,92,13,86,52,17,77, 4,89,55,40,],
        [ 4,52, 8,83,97,35,99,16, 7,97,57,32,16,26,26,79,33,27,98,66,],
        [88,36,68,87,57,62,20,72, 3,46,33,67,46,55,12,32,63,93,53,69,],
        [ 4,42,16,73,38,25,39,11,24,94,72,18, 8,46,29,32,40,62,76,36,],
        [20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74, 4,36,16,],
        [20,73,35,29,78,31,90, 1,74,31,49,71,48,86,81,16,23,57, 5,54,],
        [ 1,70,54,71,83,51,54,69,16,92,33,48,61,43,52, 1,89,19,67,48,],
    ]

    def seqs(nums, row, col):
        if row + adj <= len(nums):                                yield list(nums[i][col] for i in range(row, row+adj))
        if col + adj <= len(nums[row]):                           yield list(nums[row][i] for i in range(col, col+adj))
        if row + adj <= len(nums) and col + adj <= len(nums[row]):yield list(nums[row+i][col+i] for i in range(0,adj))
        if row + adj <= len(nums) and col >= adj - 1:             yield list(nums[row+i][col-i] for i in range(0,adj))

    def product(seq):
        n = 1
        for x in seq: n = n * x
        return n

    def list_seqs(nums):
        for row in range(0, len(nums)):
            for col in range(0, len(nums[row])):
                for seq in seqs(nums, row, col):
                    yield seq

    return max(product(seq) for seq in list_seqs(nums))

